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FOG North Finder Module for Autonomous Navigation and Inertial Alignment

Categories Accelerometer Gyro Sensor
Brand Name: Firepower
Model Number: NF701A
Place of Origin: China
MOQ: 1
Price: 5000$
Payment Terms: L/C,T/T
Supply Ability: 500/pcs
Delivery Time: 1 week for sample
Packaging Details: sponge+ carton
Accuracy: 0.3° typical (NF701A), 0.5° (NF701B)
Interface: RS422
Setup Time: ≤ 3 minutes
Weight: ≤ 2 kg
Dimensions: 15 × 90 × 110 mm
Power Input: DC 12–24 V
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FOG North Finder Module for Autonomous Navigation and Inertial Alignment

FOG North Finder is an advanced north-seeking instrument that determines true north without magnetic interference. It uses a fiber optic gyroscope to measure the Earth’s rotation rate and calculate azimuth and attitude angles with exceptional stability and speed.
This all-in-one electromechanical system combines a FOG sensor, precision accelerometer, servo rotation control, and embedded computer. It achieves north-seeking accuracy of ≤0.3° (NF701A) and ≤0.5° (NF701B), with a setup time under 3 minutes.
Weighing less than 2 kg and consuming only 15 W, the unit is ideal for field applications in UAVs, land vehicles, and marine navigation. The device operates reliably from -40 °C to +70 °C, powered by DC 12–24 V, and communicates via RS-422 interface



Overall dimensions

Dimension (mm): 115 × 90 × 110

1.2 Main technical indicators

A) North seeking time: ≤ 3 min;

B) North seeking accuracy (1σ): ≤ 0.3 ° (NF701A); ≤ 0.5 ° (NF701B)

C) Horizontal accuracy: ≤ 0.05 ° (1σ);

D) Circumference: ≤ 0.5 ° (1σ)

E) Weight: ≤ 2 kg;

F) Power supply: DC 12V ~ 24V;

G) Power consumption: 15 W (peak);

H) Interface: RS422

I) Working mode: start automatic self-check after power on, control north seeking by the upper computer, and send north seeking results to the upper computer after north seeking is completed;

1.3 Environmental requirements

1) Working temperature: -40 ℃ ~ + 70 ℃;

2) Storage temperature: -55 ℃ ~ + 85 ℃.

3) Humid and hot environmental conditions: relative humidity is less than 95%.

4) Appearance: The metal surface shall be free of rust, and the coating shall be free of blistering, peeling, etc.

1.4 Electrical performance

Insulation resistance: the insulation resistance between the independent circuits of the fiber optic gyroscope north finder and between the circuit and the shell shall not be less than 10 MΩ under standard atmospheric conditions.

1.5 Reliability and maintainability

MTBF ≥ 1000 hours;

MTTR ≤30min.

1.6 External interface

1.6.1 With DC12 V ~ 24V power input.

1.6.2 With serial port output function.

1.8.3 External plug:

Interface Y50EX-0607TX2, see the table below for pin definition.

Plug pin number

Functional definition

a

DC12 V ~24V

b

DC12 V ~24V GND

c

TD+

d

TD-

e

RD+

f

RD-

g

GND


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